John's slight speech impediment made it difficult for his mother to understand him.

约翰轻微的口吃使他母亲难以听懂他。

It was a man with a speech impediment, and I began imitating him.

打电话的是个口吃的人，然后我就开始模仿他。

It's difficult to understand him because he has a speech impediment.

他的话很难听懂，因为他讲话口吃。

Off the court though, he is seen as dense and dull on account of his speech impediment.

在场上，由于他的言语障碍，他被视为密集和沉闷。

The Society of Teachers of speech and Drama has gone so far as to describe it as a speech impediment.

演讲及戏剧教师协会甚至将其称作一种语言障碍。